The cell's cytoplasm of certain species may be divided into endoplasm and ectoplasm. The endoplasm refers to the inner dense part of the cytoplasm and is often granulated. In contrast, the ectoplasm is the clear outer part of the cytoplasm. Furthermore, the endoplasm is adjacent to the endoplasm whereas the ectoplasm is adjacent to the plasma membrane. The endoplasm is separated from the nucleus by the nuclear envelope.